so my birthday is coming up and the only thing really on my list is a fish finder. I would like to get the piranha 180.  Is there a better bang for my buck?  I would like to keep it in or under the $200 range.  It will probably stay at the lake where we have an aluminum boat so size is not a problem. 
  
not interested in the cast-able ones as the batteries die out in about a year or two. 
  
Thanks